How about: 5-4 = 1
Factors of 20 are 1, 2, 4, 5, 10 and 20. And their sum is 1 + 2 + 4 + 5 + 10 + 20 = 32.
1 + 2 + 4 = 7
Factors for 20 are: 1, 2, 4, 5, 10, 20 Prime Factors: 2, 5 sum of prime factors = 2 + 5 = 7
Add them up. The factors of 9 are 1, 3 and 9. The sum of the factors is 13.
1 + 2 + 4 + 5 + 10 + 20 = 42
The factors of 91 are: 1 7 13 91.The prime factors are: 7 x 13The sum of the prime factors = 7 + 13 = 20
20 and 1 10, 5, 4 and 2
The factors of 3 are 1 and 3. The sum of the digits of these factors is calculated as follows: for 1, the sum of its digits is 1, and for 3, the sum of its digits is 3. Therefore, the total sum of the digits of the factors of 3 is 1 + 3 = 4.
Well, honey, the sum of counting numbers from 1 to 20 is 210. You add up 1 + 2 + 3... all the way to 20 and you get your answer. So, go ahead and impress your friends with your newfound math knowledge.
Its factors are: 1, 3, 9, 27 and they add up to 40
3, 3, 19 and 20 lots of (-1). However, normally the term "factor" applies to positive integers. In that case, there is no answer to the question.
12 and 3 10 and 5 16 and -1 20 and -5